David Fischer submitted a really neat tool to GitHub’s Data Challenge recently: a map of the world where he plotted all the open source contributors to the 200 most active GitHub repos in the first four months of 2013.

It's Rails day as Heroku moves to Ruby 2.0, Rails 2.3's life is lingering, we build Awesome APIs, visit removing Views, cut back on Callbacks, expand our Environments, and tackle Changed Tests on this episode of Ruby5.